210122300300021 has 4 divisors (see below), whose sum is σ = 211726287325344. Its totient is φ = 208518313274700.

The previous prime is 210122300299991. The next prime is 210122300300023. The reversal of 210122300300021 is 120003003221012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 210122300300021 - 2³⁰ = 210121226558197 is a prime.

It is a super-2 number, since 2×210122300300021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122300300023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801993512465 + ... + 801993512726.

It is an arithmetic number, because the mean of its divisors is an integer number (52931571831336).

Almost surely, 2^{210122300300021} is an apocalyptic number.

It is an amenable number.

210122300300021 is a deficient number, since it is larger than the sum of its proper divisors (1603987025323).

210122300300021 is a wasteful number, since it uses less digits than its factorization.

210122300300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603987025322.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 210122300300021 its reverse (120003003221012), we get a palindrome (330125303521033).

The spelling of 210122300300021 in words is "two hundred ten trillion, one hundred twenty-two billion, three hundred million, three hundred thousand, twenty-one".